/*
 *  Copyright 2011 yura.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package org.opu.db_vdumper.util;

/**
 *
 * @author yura
 */
public class StringUtil {

    /**
     * Return true if str not null and not empty.
     * @param str string
     * @return true if str not null and not empty.
     */
    public static boolean ifStr(String str){
        return str != null && !str.isEmpty();
    }

    /**
     *  Return true if str1 equal str2 or both is null
     * @param str1 first string
     * @param str2 second string
     * @return true if str1 equal str2 or both is null
     */
    public static boolean equals(String str1, String str2){
        return (str1 == null ? str2 == null : str1.equals(str2));
    }

    /**
     *  Returns a copy of the string, with leading and trailing whitespace omitted.
     * @param str input string
     * @return copy of the string, with leading and trailing whitespace omitted.
     */
    public static String trim(String str){
        if (str == null){
            return "";
        }

        if (str.isEmpty()){
            return str;
        }

        return str.trim();
    }
}
